Coal does not produce flame when burnt because it does not vapourizes
False
<u>Explanation:</u>
The spacesuit protects the astronauts from various range of temperatures from -156°C to 121°C. Spacesuits have insulation as well as heaters. Spacesuits are equipped with thermal control systems to keep the temperature warm for the astronauts. The heaters in the spacesuit increases the temperature during extreme cold. When the astronaut's body temperature rises, the material absorbs the heat. When it drops, the material gives off the heat, providing warmth. Insulators uses micro-encapsulated phase-change materials.
Answer:
22/7 ×
Explanation:
The area of a circle can be found out using π. Since r is the radius so if they multiply, they will give you an area of a square then multiply by 22/7 since it is a circle.
His distance and displacement are the same, which was 400 m
<h3>Further explanation</h3>
Given
Distance = 400 m
time = 2 min
Required
Distance and displacement
Solution
Distance is a scalar quantity that indicates the length of the trajectory that is traveled by an object within a certain interval. Distance has no direction, only has magnitude
Can be simplified distance = totals traveled
Displacement is a vector quantity that shows changes in the position of objects in a certain interval of time. Displacement has magnitude and direction
Can be simplified displacement = distanced traveled from starting point to ending point
From the definition above shows that the displacement and the distance that he traveled have the same value (magnitude), which is equal to 400 m
The value of the two will be different if he starts and finishes at the same point, then the displacement value is zero while the distance he has traveled is still 0